1[transitive,intransitive]thump (somebody/something) (+ adv./prep.)to hit somebody/something hard, especially with your closed handHe thumped the table angrily.She couldn't get her breath and had to be thumped on the back.(informal)I'll thump you if you say that again.(figurative)He thumped out a tune (= played it very loudly) on the piano.

2[intransitive,transitive]to fall on or hit a surface hard, with a loud dull sound; to make something do this+ adv./prep.A bird thumped against the window.thump something + adv./prep.He thumped the report down on my desk.

3[intransitive]to beat stronglyMy heart was thumping with excitement.

see alsotub-thumpingWord Originmid 16th cent.: imitative.Extra examplesHe spun around, his heart thumping against his ribs.He thumped Jack hard in the face.He thumped his fist down onto the table.Her heart began to thump wildly in her chest.She thumped the desk with her fist.I’ll thump you if you say that again.She couldn’t get her breath and had to be thumped on the back.She thumped the table angrily.